Optimal lot sizing under continuous price decrease

An important characteristic of high-tech industries is decreasing component prices over time. In the personal computer industry, some component prices decline at a rate of 1% per week. This paper develops an inventory model for products experiencing continuous decrease in unit price. We develop an accurate closed-form approximate solution to the model. Our results indicate that declining prices lead to substantial decrease in the optimal cycle time and much frequent ordering. This explains the heavy emphasis on just-in-time inventory management practiced by successful companies in high-tech industries. While previous models attributed the success of just-in-time policies to reduced holding cost and improved quality, under declining prices a substantial source of savings becomes lower costs of raw materials which is significant part of cost in these industries. We illustrate the results of the model with a numerical example and perform sensitivity analysis.     

我国上市公司资本结构影响因素的行业分析

2000年上市公司按照行业可划分为6大行业,不同行业资本结构的影响因素各不相同,不同行业各自的特征决定了各行业自身的资本结构。     

贵州省主导产业选择的投入产出分析

正确地选择主导产业对一个地区的经济发展有着至关重要的作用。本文以贵州省投入产出表为依据，运用投入产出分析方法，对地区主导产业的选择进行探讨，为贵州省产业结构调整和区域经济发展规划提供经济学意义的理论参考。     

我国产业间波及效应的探讨

从理论上来说,某一产业的变化会引起其它产业间的连锁反映。产业间的波及效应可以通过投入系数表来加以分析。通过实证分析,研究我国产业间波及效应的强弱,可以为国家制定产业政策、优化产业结构提供依据。     

The Evolution of Knowledge and the Dynamics of an Industry Network

The paper moves a step forward in the direction of establishing a connection between the structure and evolution of knowledge bases and the structure and evolution of organizational forms in innovative activities in a science-intensive industry. The paper has an explicit focus on the dynamics of the network of collaborative agreements in R&D in the pharma/biotech industry after the “molecular biology revolution”. Using a comprehensive dataset, built by the authors integrating several sources in the industry, the dynamics of the network over time is extensively analyzed. With regards to network structure, it is found that, while the size of the network increases over time due to net flows of entry, its topological properties remain relatively unchanged. The evolution of the network has occurred without relevant deformations in the core-periphery profile. With regards to age-dependent propensity to collaborate, the paper finds that the extent of inter-generational collaboration is much more significant than intra-generational collaboration. In addition, the propensity of firms of a given generation to enter into collaboration with firms of a different generation increases with the distance between the two, while the total number of intra-generational collaborations decreases over time and, moreover, tends to decrease for most recent generations. In the paper a unitary and coherent explanation of the evidence is developed, coming to reveal the existence of a striking isomorphism between structural properties of the dynamics of knowledge and of the evolution of network structure. This revised version was published online in July 2006 with corrections to the Cover Date.     

关于推进我国由核大国向核强国迈进的探讨与思考

论文阐述了推进我国核大国向核强国迈进的背景、规划、核战略产业、军民融合海陆空领域的发展。首先题解我国核大国、强国的顶层设计、国外背景、10大产业的大国强国方向;进而阐明了我国已步入核电大国行列,在役在建设核电站进入世界第三位,但核电在国际国内能源、电力中比重很小,迈向核电强国任务艰巨;进而阐明举全国之力做强我国核工业,建设更先进的核潜艇,研发中国战略重器核航空母舰;建立强大有后处理的核燃料循环,打造“中国造”华龙1号,全产业链走出去;实施一批重大工程建设,推动核科技进步,继续研发、部署小堆项目建设;抓紧以核电代煤、治霾、减碳、供热的开发工作;加大核科技在农学、医学、科研、军工的应用。认真贯彻《核安全法》确保核工业安全发展,健全完善核应急体系,推动核安保能力提升,不断完善核安全结构和核安全系统的顶层设计,保障核工业安全万无一失。抓好军民深度融合国家战略发展,军民对接,使命承担,发展军民融合产业。     

三产化的分析

本文提出了三产化这个与工业化、城市化并驾齐驱的概念,探讨了三产化的指标、阶段、特性和需求,分析了我国三产化的现状、演变和潜力,论述了我国三产化的调控,以促进第三产业的发展,提高三产化程度,使三产化、工业化与城市化共同推动经济和社会的发展。     

Catch-up as a Survival Strategy in the Solar Power Industry

We evaluate the strategies of the emerging market firms in the context of nascent industries. We use the Indian solar power industry as the empirical setting, against the backdrop of the evolution of the global industry, While in traditional industries emerging market firms learn from advanced economy multinational enterprises (MNEs) and slowly upgrade their capabilities, in the intensely competitive environment of nascent innovative industries, emerging market firms are exposed to global competition in their home market right from the early years. This shortens their catch-up clock. As a result, their long-term survival depends on their ability to catch-up fast, both in output and innovation capabilities. In the solar power industry, we find that innovations stem, in the main, from advanced economy firms. Further, Chinese firms are beginning to move from cost-based imitation to innovation. In contrast, with a few key exceptions, most firms in the Indian solar industry remain locked within a narrow niche of downstream site-based installation. Their operations are opportunistic, short term, and without specific catch-up goals, a scenario that does not bode well for the industry's future in India.     

Oiling the wheels? Flexible labour markets and the migration industry

ABSTRACT

The growing commercialisation of migration, often through a multiplicity of labour market intermediaries, is an issue of increasing academic interest. We seek to contribute to an emerging research agenda on the migration industries by exploring how one of the key actors that constitutes it, recruitment agencies, sits at the nexus between flexible labour market structures and migrant labour. Interviews with U.K. labour providers and low-wage employers form the evidence base for an analysis of the strategies developed by recruiters to derive commercial gain from connecting the so-called ‘supply’ and ‘demand’ sides of the flexible international labour market. We seek to contribute to understandings of the analytical categories within migration systems by illustrating how the migration industry interacts with other key stakeholders to structure international migration.     

金融发展、融资约束与战略性新兴产业发展

战略性新兴产业发展需要大量的资金投入,过高的外部融资成本已经成为阻碍战略性新兴产业发展的重要因素.促进战略性新兴产业发展,已经成为一个亟待解决的问题.文章利用2011-2014年七大战略性新兴产业422家上市公司15个季度的面板数据,分别考察了中国银行业与股票市场发展对战略性新兴产业发展的影响.实证结果显示,七大战略性新兴产业的融资约束具有异质性,节能环保产业、高端装备制造业和生物医药产业融资约束较小,新材料、新一代信息技术、新能源汽车和新能源产业具有更大的融资约束.进一步研究发现,金融发展缓解了战略性新兴产业的融资约束,其中股票市场发展较银行发展更能缓解战略性新兴产业的融资约束.